Thanks to a just-released interview, we've realized that the similar style is no coincidence. Rather, Kim was providing her friend with plenty of maternity style advice, including a recommendation for a piece she lived in while pregnant.

"She told me to go stretchy. I always wanted to be the person who showed off the bump because it looks beautiful and I think you should embrace it," she told InStyle Australia. "Kim does that well and I love seeing that belly of hers and I know Kanye does too—we're lucky to be with men who find pregnancy sexy."

"There's this one Wolford tube dress that you can fold a million different ways. You can make it a skirt, a this, that. I bought it in every color in small, medium, [and] large, in anticipation of the entire process, so I have, like, 45 of them."

The green skirt she wore earlier this month is similar to the Wolford style, and when you look at it worn as a skirt, hitting at the mid-calf, it's easy to imagine how it transitions to a dress. Pull it up to chest-level and you've instantly got a knee-length number.